KR920005091A - How to control capstan motor speed during fast forward / rewind of video tape recorder - Google Patents

How to control capstan motor speed during fast forward / rewind of video tape recorder Download PDF

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Publication number
KR920005091A
KR920005091A KR1019900013169A KR900013169A KR920005091A KR 920005091 A KR920005091 A KR 920005091A KR 1019900013169 A KR1019900013169 A KR 1019900013169A KR 900013169 A KR900013169 A KR 900013169A KR 920005091 A KR920005091 A KR 920005091A
Authority
KR
South Korea
Prior art keywords
capstan motor
rewind
motor speed
fast forward
video tape
Prior art date
Application number
KR1019900013169A
Other languages
Korean (ko)
Inventor
이호원
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019900013169A priority Critical patent/KR920005091A/en
Publication of KR920005091A publication Critical patent/KR920005091A/en

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Abstract

내용 없음No content

Description

비디오 테이프 레코더의 고속 빨리감기/되감기시 캡스턴 모터 속도 제어 방법How to control capstan motor speed during fast forward / rewind of video tape recorder

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명 방법에 관련된 장치의 블록 구성도.1 is a block diagram of an apparatus related to the method of the present invention.

제2도는 본 발명 방법의 동작 설명을 위한 플로우챠트.2 is a flowchart for explaining the operation of the method of the present invention.

제3도는 본 발명에서 캡스턴 모터의 등가 회로도.3 is an equivalent circuit diagram of a capstan motor in the present invention.

Claims (1)

공급측 및 감기측 릴 펄스 검출용 포트 트랜지스터(1),(2)에 의해 각각 공급측 및 감기측 릴 펄스폭을 검출하고, 상기 검출 아날로그 신호를 A/D변환기(3)(4)를 통해 디지탈화 한 후 가산기(5)를 거쳐 합한 신호(L=Ls+Lt)값을 구한 다음 비교기(6)에서 허브 직경에 따른 카세트의 종류에 의해 미리 설정되어 있는 기준값(LA)과 비교하여 기준값 보다 크면 러브 직경(r)이 31㎜인 카세트로 판별하고 기준값 보다 작으면 허브 직경이 13㎜인 카세트로 판별한 후 테이프 속도 및 테이프 감긴량을 계산하고 모터 속도를 계산하여 속도제어기(8)에 출력한후 환산된 전류값(Ia)에 의해 캡스턴 모터(M)의 속도를 제어 하도록 함을 특징으로 하는 비디오 테이프 레코더의 고속 빨리감기/되감기시 캡스턴 모터 속도 제어 방법.The supply side and winding side reel pulse detection port transistors (1) and (2) detect the supply side and winding side reel pulse widths, respectively, and digitalize the detected analog signal through the A / D converters (3) (4). After the sum signal (L = Ls + Lt) is obtained through the adder (5), the comparator (6) is compared with the reference value (LA) preset by the type of cassette according to the hub diameter. (r) is identified as a cassette of 31 mm and if smaller than the reference value, it is determined as a cassette with hub diameter of 13 mm, the tape speed and the amount of tape wound are calculated, the motor speed is calculated and output to the speed controller 8, and converted A capstan motor speed control method for fast forward / rewind of a video tape recorder, characterized by controlling the speed of the capstan motor M by the current value Ia. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019900013169A 1990-08-25 1990-08-25 How to control capstan motor speed during fast forward / rewind of video tape recorder KR920005091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900013169A KR920005091A (en) 1990-08-25 1990-08-25 How to control capstan motor speed during fast forward / rewind of video tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900013169A KR920005091A (en) 1990-08-25 1990-08-25 How to control capstan motor speed during fast forward / rewind of video tape recorder

Publications (1)

Publication Number Publication Date
KR920005091A true KR920005091A (en) 1992-03-28

Family

ID=67549835

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900013169A KR920005091A (en) 1990-08-25 1990-08-25 How to control capstan motor speed during fast forward / rewind of video tape recorder

Country Status (1)

Country Link
KR (1) KR920005091A (en)

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